We encountered a similar detour on old route 66 between Kingman & Seilgman Arizona approximately 5:30pm on June 28th.
After driving more than 55 miles on route 66 from Seilgman towards Kingman at Valentine Arizona they had the road closed do to a small fire over the ridge and had all the traffic return to Seligman (55 miles) and find an alternate route.
It would have been nice if they had the road closed to thru traffic at seligman. Even after driving the 55 miles back to Seligman there was no signs or anyone telling you the road was closed 55 miles ahead. Not a happy camper.
M & N
Tundra TRD V8 4x4 w/Leer Shell
EU2000i * Prodigy * McKesh * Trek * Renogy * ENU